CN114349421A - Self-luminous cement base material and preparation method thereof - Google Patents
Self-luminous cement base material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/807—Luminescent or fluorescent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The application relates to the field of self-luminous materials, and particularly discloses a self-luminous cement base material and a preparation method thereof. The self-luminous cement base material is subjected to vacuum pressing treatment and comprises the following components in parts by weight: 330-390 parts of quartz sand, 140-180 parts of cement, 3-6 parts of a water reducing agent, 18-30 parts of a toughening agent, 12-48 parts of a long-afterglow luminescent material and 10-20 parts of water, wherein the total amount of water, the water reducing agent and the toughening agent is 18-24% of the weight of the cement, and the weight of the long-afterglow luminescent material is 8-28% of the weight of the cement. The self-luminous cement base material prepared by the method has both mechanical property and afterglow property, the luminance is high, the afterglow time is long, the breaking strength of the cement base material at the age of 7 days can reach 16.5MPa, and the compressive strength can reach 111.6 MPa.
Description
Technical Field
The application relates to the field of self-luminous materials, in particular to a self-luminous cement base material and a preparation method thereof.
Background
The long afterglow luminescent material is a photoluminescent material which can store the energy irradiated by external light under the irradiation of natural light or artificial light source, slowly release in the form of visible light and still emit visible light for a long time after the light source is removed, and is widely applied to various fields, such as luminous labels, luminous paint, luminous plastics, luminous adhesive tapes, luminous ceramics, luminous fibers and the like, due to the advantages of high brightness, long afterglow time, stable chemical properties, no pollution, no radioactivity and the like, and is mainly used for low brightness emergency lighting, decoration beautification, indication marks and the like in life.
With the improvement of the demand of people on living quality, in the building industry, building decoration materials are required to have excellent physical properties and structural properties and also to have more and more functions such as decoration, energy conservation, low carbon and the like. The self-luminous building decorative material is popular due to the functions of illumination and decoration, and is more and more widely applied in the building industry, wherein the self-luminous cement-based building decorative material prepared by doping long-afterglow luminescent materials into cement-based materials is one of the main self-luminous building decorative materials at present.
However, the incorporation of the long-afterglow luminescent material can reduce the flexural strength and the compressive strength of the cement-based material, and the reduction of the incorporation amount of the long-afterglow luminescent material can improve the flexural strength and the compressive strength of the cement-based material, but can cause the reduction of the luminance of the cement-based material, so that the problem that how to consider the flexural strength, the compressive strength and the luminance of the cement-based material is an urgent need to be solved.
Disclosure of Invention
In order to solve the problem that the mixing amount of the long-afterglow luminescent material and the breaking strength and the compressive strength of the cement-based material are difficult to be considered, the application provides the self-luminous cement base material and the preparation method thereof, and the progress is thatAfter the cement-based material is doped with the long afterglow luminescent material, the cement-based material can keep excellent rupture strength and compressive strength, the luminescent time is long after the cement-based material is excited by losing light source irradiation, and the luminescent brightness after 10 hours can still meet the minimum visible brightness (0.32 mcd/m) of human eyes2) The requirements of (1).
The applicant has conducted a great deal of tests on different proportions of the long-afterglow luminescent material, cement, aggregate and related additives in the research and development process, but it is difficult to achieve the balance between the mechanical property and the luminous brightness of the cement-based material all the time. However, in the test process, the aluminate-based long-afterglow luminescent material is found to have poor water resistance, the afterglow performance of the aluminate-based long-afterglow luminescent material is greatly reduced after the aluminate-based long-afterglow luminescent material is soaked in water for 2 hours, the luminous intensity is reduced, the luminous time is shortened, and the possibility that the afterglow performance of the long-afterglow luminescent material is influenced by the large proportion of water in the proportion is inferred. Therefore, the applicant tries to reduce the water cement ratio (the ratio of water to cement) in the formula, but the cement-based material has a requirement on the slump of the cement-based material in the construction process, for concrete such as cement-based material, in a practical range, the slump of the concrete is increased along with the increase of water consumption, namely the fluidity of the concrete is improved, the water cement ratio is generally controlled to be 0.4-0.5, and under the condition of low water cement ratio (less than 0.4), the common concrete is dry and thick integrally, the construction difficulty is improved, and a new problem is brought to the doping of the long-afterglow luminescent material in the cement-based material. Based on the above, the applicant further performs vacuum pressing treatment on the cement-based material while controlling the lower water-cement ratio in the formula, so that the cement-based material forms a specific section bar or a prefabricated member or a plate for direct use during construction, thereby realizing the consideration of the mechanical property and the afterglow property of the cement-based material doped with the long afterglow luminescent material.
The first aspect, this application provides a self-luminous type cement substrate, adopts following technical scheme:
the self-luminous cement base material is subjected to vacuum pressing treatment and comprises the following components in parts by weight:
330-390 parts of quartz sand
140-180 parts of cement
3-6 parts of water reducing agent
18-30 parts of toughening agent
12-48 parts of long afterglow luminescent material
10-20 parts of water;
wherein the total water content in the water, the water reducing agent and the toughening agent is 18-24% of the weight of the cement, and the weight of the long-afterglow luminescent material is 8-28% of the weight of the cement.
By adopting the technical scheme, the water-cement ratio is controlled to be 0.18-0.24 and the water reducing agent is matched in the formula, so that the water consumption in the system is greatly reduced, the influence of moisture on the afterglow performance of the long afterglow luminescent material is reduced, the problems of reduced luminous brightness and shortened luminous time of the cement-based material caused by poor water resistance of the long afterglow luminescent material are solved, the influence of the long afterglow luminescent material on the mechanical property of the cement-based material is favorably reduced and the cost of the long afterglow luminescent material is saved by controlling the weight ratio of the addition amount of the long afterglow luminescent material to the addition amount of the cement to be 0.08-0.28, the proportion of the addition amount of the long afterglow luminescent material is reduced while the afterglow performance is ensured, the prepared cement-based material is subjected to vacuum pressing, the porosity in the cement-based material is effectively reduced, the structure of the cement-based material is more compact, and the toughening agent in the cement-based material system is matched, the flexural strength and the compressive strength of the cement base material are greatly improved, and tests prove that the luminous brightness of the self-luminous cement base material prepared by the method is kept at 0.02-0.2 cd/m after being measured in a dark room for 10 hours2Can meet the minimum visual brightness (0.32 mcd/m) of human eyes2) The afterglow time can reach 11h, the breaking strength of the cement base material at the age of 7 days can reach 16.5MPa, and the compressive strength can reach 111.6 MPa.
Preferably, the particle size of the quartz sand is 10-120 meshes.
Tests prove that when the mesh number of the quartz sand is less than 10 meshes, the quartz sand is too large, light can be shielded, and the luminous effect is influenced, and when the mesh number of the quartz sand is more than 120 meshes, the quartz sand is too small, is difficult to disperse uniformly in a system, is easy to agglomerate, and has poor application effect; the particle size of the quartz sand is controlled to be 10-120 meshes, the quartz sand has a good dispersing effect, is not easy to agglomerate, has good system uniformity, and is beneficial to improving the luminous effect of the long-afterglow luminescent material in the system.
Preferably, the quartz sand is prepared by compounding the following continuous particle fractions in percentage by weight: 11-15% of 10-16 meshes, 17-21% of 16-26 meshes, 15-19% of 26-40 meshes, 20-24% of 40-70 meshes and 27-31% of 70-120 meshes.
By adopting the technical scheme, the continuous grain-size-fraction compounded quartz sand can ensure that the system is more compact after being stirred and mixed, is favorable for reducing the porosity of the cement base material, and is favorable for improving the breaking strength and the compressive strength of the cement base material.
Preferably, the long-afterglow luminescent material is an aluminate-based long-afterglow luminescent material.
Preferably, the long afterglow luminescent material is SrAl2O4:Eu2+,Dy3+。
By adopting the technical scheme, SrAl2O4:Eu2+,Dy3+Long afterglow time, high afterglow strength, high chemical stability and low cost.
Preferably, SrAl2O4:Eu2+,Dy3+The particle size of (A) is 200 to 300 mesh.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is not lower than 20%.
Preferably, the toughening agent is styrene-butadiene emulsion, and the solid content is 45-50%.
By adopting the technical scheme, the styrene-butadiene emulsion can improve the flexural strength, compressive strength and bending toughness of the cement base material, so that the cement base material has certain bending capacity in the processes of demoulding, conveying and the like, is convenient for demoulding, and is not easy to crack.
Preferably, the cement is p.w52.5 white cement.
In a second aspect, the present application provides a method for preparing a self-luminous cement substrate, which adopts the following technical scheme:
a preparation method of a self-luminous cement base material comprises the following steps:
uniformly mixing quartz sand and the long-afterglow luminescent material to obtain a mixture A;
uniformly mixing water and a water reducing agent, adding the mixture A, and uniformly mixing to obtain a mixture B;
adding the cement into the mixture B and uniformly mixing to obtain a mixture C;
adding a toughening agent into the mixture C and uniformly mixing to obtain a mixture D;
pouring the mixture D into a mold, and performing vacuum compression molding to obtain a rough blank;
and (5) performing steam curing on the rough blank to obtain the self-luminous cement base material.
By adopting the preparation method, the materials are mixed in sequence, so that the materials are favorably and fully stirred uniformly, the uniformity of a system is improved, and the mechanical property and the afterglow property of the prepared cement base material are favorably improved.
Preferably, in the step of preparing the mixture A, the stirring time is 1-2 min, in the step of preparing the mixture B, the stirring time is 2-3 min, in the step of preparing the mixture C, the stirring time is 2-4 min, and in the step of preparing the mixture D, the stirring time is 2-3 min.
Preferably, in the vacuum pressing step, the vacuumizing time is 30-60 s, the absolute vacuum degree is 0.09-0.1 MPa, the pressure is 300 tons, the vibration frequency is 40-50 Hz, and the pressing time is 2-3 min.
Preferably, in the steam curing step, the curing temperature is 60-70 ℃, and the curing time is not less than 7 days.
By adopting the technical scheme, the rough blank is easy to crack due to thermal stress when the steam curing temperature is too high, the curing effect is poor when the steam curing temperature is too low, and the mechanical property of the prepared cement base material is poor.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the water-cement ratio is controlled to be 0.18-0.24, and the water reducing agent is matched, so that the water consumption in a system is greatly reduced, the problems of reduced luminous brightness and shortened luminous time of a cement-based material caused by poor water resistance of the long-afterglow luminescent material are solved, the weight ratio of the addition amount of the long-afterglow luminescent material to the addition amount of the cement is controlled to be 0.08-0.28, the percentage of the addition amount of the long-afterglow luminescent material is reduced while the afterglow performance is ensured, the influence of the long-afterglow luminescent material on the mechanical property of the cement-based material is reduced, the prepared cement-based material is subjected to vacuum pressing, the porosity is low, the structure is dense, the breaking strength and the compression strength of the cement-based material are greatly improved by matching with the toughening agent, and the luminous brightness of the self-luminous type cement-based material prepared by the method is kept at 0.02-0.2 cd/m after 10 hours in a darkroom through tests2Can meet the minimum visual brightness (0.32 mcd/m) of human eyes2) The afterglow time can reach 11h, the breaking strength of the cement base material at the age of 7 days can reach 16.5MPa, and the compressive strength can reach 111.6 MPa.
2. In the application, the continuous-grade compound quartz sand is preferably adopted, so that the system is more compact after being stirred and mixed, the porosity in the cement base material is favorably reduced, and the breaking strength and the compressive strength of the cement base material are improved.
3. According to the preparation method, the materials are mixed in sequence, so that the materials are stirred uniformly, the mechanical property and the afterglow property of the prepared cement base material are improved, the preparation method is very simple, the implementation difficulty is low, the cement base material is molded by adopting a vacuum pressing mode, the curing time of the cement base material is saved, the production efficiency is high, the compactness of the cement base material can be greatly improved, the breaking strength and the compressive strength of the cement base material are improved, and the product performance is good.
Detailed Description
The long afterglow luminescent material is widely used in the field of building materials due to the advantages of high brightness, long afterglow time, stable chemical performance, no pollution, no radioactivity and the like. However, the incorporation of the long-afterglow luminescent material can reduce the flexural strength and compressive strength of the cement-based material, and the reduction of the incorporation amount of the long-afterglow luminescent material can cause the reduction of the luminance of the cement-based material, so that the incorporation of the long-afterglow luminescent material and the cement-based material is difficult to realize. Therefore, the applicant has conducted a great deal of tests on different proportions of the long-afterglow luminescent material, cement, aggregate and related additives, but it is difficult to achieve the balance between the mechanical property and the luminescent brightness of the cement-based material. However, in the test process, the aluminate-based long-afterglow luminescent material is found to have poor water resistance, so the applicant tries to reduce the water-cement ratio (the ratio of water to cement) in the formula, but the reduction of the water amount leads to the reduction of the slump of the cement-based material, the fluidity of the cement-based material is reduced in the test process, and the construction difficulty is improved. Based on the above, the applicant further performs vacuum pressing treatment on the cement-based material while controlling the lower water-cement ratio in the formula, so that the cement-based material forms a specific section bar or a prefabricated member or a plate for direct use during construction, thereby realizing the consideration of the mechanical property and the afterglow property of the cement-based material doped with the long afterglow luminescent material. The present application has been made based on the above findings.
In order to facilitate understanding of the technical solutions of the present application, the following detailed descriptions of the present application are provided with reference to tables and examples, but the present application is not limited to the scope of protection defined by the present application.
Example 1
330 parts of quartz sand, 140 parts of cement, 4 parts of water reducing agent, 25 parts of toughening agent, 12 parts of long-afterglow luminescent material and 10 parts of water, wherein the mesh number of the quartz sand is 70 meshes, the cement is P.W52.5 white cement, and the long-afterglow luminescent material is SrAl2O4:Eu2+,Dy3+The water reducing agent is a polycarboxylate water reducing agent with the solid content of 30%, and the toughening agent is a butylbenzene emulsion with the solid content of 50%.
Adding quartz sand and the long-afterglow luminescent material into a stirring container, stirring for 2min, uniformly mixing to obtain a mixture A, uniformly mixing water and a water reducing agent, adding the mixture A, stirring for 3min, uniformly mixing to obtain a mixture B, adding cement into the mixture B, stirring for 4min, uniformly mixing to obtain a mixture C, adding a toughening agent into the mixture C, stirring for 3min, and uniformly mixing to obtain a mixture D.
Pouring the mixture D into a mold, performing vacuum compression molding to obtain a rough blank, controlling the vacuumizing time to be 60s, the absolute vacuum degree to be 0.1MPa, the pressure to be 300 tons, the vibration frequency to be 50Hz, and the compression time to be 3min, and performing steam curing on the rough blank at the temperature of 60 ℃ for 7 days to obtain the self-luminous cement base material.
Example 2
The cement base material is different from the cement base material in example 1 in that the cement base material comprises the following components in parts by weight: 350 parts of quartz sand, 150 parts of cement, 6 parts of water reducing agent, 24 parts of toughening agent, 37 parts of long afterglow luminescent material and 12 parts of water.
Example 3
The cement base material is different from the cement base material in example 1 in that the cement base material comprises the following components in parts by weight: 360 parts of quartz sand, 160 parts of cement, 6 parts of water reducing agent, 30 parts of toughening agent, 26 parts of long afterglow luminescent material and 19 parts of water.
Example 4
The cement base material is different from the cement base material in example 1 in that the cement base material comprises the following components in parts by weight: 380 parts of quartz sand, 170 parts of cement, 5 parts of water reducing agent, 18 parts of toughening agent, 48 parts of long afterglow luminescent material and 20 parts of water.
Example 5
The cement base material is different from the cement base material in example 1 in that the cement base material comprises the following components in parts by weight: 390 portions of quartz sand, 180 portions of cement, 3 portions of water reducing agent, 28 portions of flexibilizer, 40 portions of long afterglow luminescent material and 20 portions of water.
Comparative example 1
The cement base material is different from the cement base material in example 1 in that the cement base material comprises the following components in parts by weight: 330 parts of quartz sand, 140 parts of cement, 4 parts of water reducing agent, 25 parts of toughening agent, 10 parts of long afterglow luminescent material and 8 parts of water.
Comparative example 2
The cement base material is different from the cement base material in example 1 in that the cement base material comprises the following components in parts by weight: 330 parts of quartz sand, 140 parts of cement, 4 parts of water reducing agent, 25 parts of toughening agent, 45 parts of long afterglow luminescent material and 22 parts of water.
Comparative example 3
The difference from the example 1 is that the mixture D is poured into a mold and is not subjected to vacuum pressing treatment, and steam curing is directly performed after natural molding and solidification.
Table 1: component ratio of self-luminous cement base materials in examples 1 to 5 and comparative examples 1 to 3
Performance detection test:
the following performance tests were performed on the self-luminous cement base materials prepared in examples 1 to 5 and comparative examples 1 to 3, and specific test data are shown in table 2;
breaking strength: the bending strength of the 7-day age is tested by referring to GB/T35160.2-2017, and the qualified standard is more than or equal to 9 MPa;
compressive strength: testing the compressive strength of the 7-day-old cement by referring to GB/T35160.3-2017, wherein the qualified standard is more than or equal to 50 MPa;
emission luminance: adopting a test method in GB/T24981.2-2010, taking the xenon lamp stop excitation irradiation as the initial time, recording the luminous brightness of the self-luminous cement base material at 10h, taking the recorded brightness value as the luminous brightness data, and the qualification standard is more than or equal to 0.32mcd/m2；
The light emitting time is as follows: the brightness of the light is lower than the minimum visible brightness of human eyes by 0.32mcd/m2And (5) measuring the light-emitting time for the end of light emission.
In the detection process, a plurality of small holes are distributed on the surface of the self-luminous cement base material prepared by the comparative example 3, and the tested flexural strength and compressive strength are poor, so that the detection of the luminous brightness and the luminous duration is not performed any more.
Table 2: performance data of the self-luminous Cement substrates obtained in examples 1 to 5 and comparative examples 1 to 3
The data of the embodiments 1-5 and the data of the table 2 show that the flexural strength, the compressive strength, the luminous brightness and the luminous duration of the self-luminous cement base material prepared by the mixture ratio of the self-luminous cement base material can reach the qualified standards, and the self-luminous cement base material has excellent mechanical properties and afterglow properties. Although the mechanical properties of the self-luminous cement base materials prepared in the examples 1 and 3 are excellent, the luminous brightness after 10 hours is greatly reduced compared with the luminous brightness of the self-luminous cement base materials prepared in the examples 4 and 5, although the luminous brightness after 10 hours is close to the luminous brightness of the self-luminous cement base materials prepared in the examples 2, the flexural strength and the compressive strength of the self-luminous cement base materials are lower than those of the self-luminous cement base materials prepared in the examples 2, therefore, the mechanical properties and the afterglow properties of the self-luminous cement base materials prepared by the component ratio of the self-luminous cement base materials prepared in the examples 2 are comprehensively considered to be more balanced, and the performance is better.
As can be seen by combining the data of the example 1, the comparative examples 1-2 and the data of the table 2, the flexural strength and the compressive strength of the self-luminous cement base material prepared in the comparative example 1 can not reach the qualified standards, the water cement ratio in the comparative example 1 is 0.166, the test process shows that the materials of the self-luminous cement base material in the comparative example 1 are too dry and thick after being mixed, the system is difficult to be uniformly mixed and easy to agglomerate, so that the mechanical property of the self-luminous cement base material is greatly reduced, the weight ratio of the long afterglow luminescent material to the cement in the comparative example 1 is 0.071, the test shows that the luminescent time is close to 10h, and the test on the luminescent brightness of 10h is only 0.24mcd/m2And the lowest visible brightness of human eyes cannot be reached. The self-luminous type cement base material prepared in the comparative example 2 cannot meet the qualified standard in all performances, the water-cement ratio is 0.266, the afterglow performance of the long afterglow luminescent material is adversely affected by analyzing the overhigh water-cement ratio, and the mechanical performance of the self-luminous type cement base material is reduced because the weight ratio of the long afterglow luminescent material to the cement in the comparative example 2 is 0.321.
The data of the example 1, the comparative example 3 and the table 2 show that the breaking strength and the compressive strength of the self-luminous cement-based material prepared without vacuum pressing treatment are only 3.2MPa and only 20.5MPa, which are far lower than the qualified standard, and the improvement effect of the vacuum pressing on the breaking strength and the compressive strength of the self-luminous cement-based material is very large.
Example 6
The difference from example 2 is that the mesh number of the quartz sand is 40 mesh.
Example 7
The difference from example 2 is that the mesh number of the quartz sand is 10 meshes.
Example 8
The difference from example 2 is that the mesh number of the quartz sand is 5 meshes.
Example 9
The difference from example 2 is that the mesh number of the quartz sand is 100 mesh.
Example 10
The difference from example 2 is that the mesh number of the quartz sand is 120 mesh.
Example 11
The difference from example 2 is that the mesh number of the quartz sand is 130 meshes.
The self-luminous cement base materials prepared in examples 6 to 11 were subjected to the performance tests, the test methods and the standards were the same, and the specific test data are shown in table 3.
Table 3: performance data for the self-luminous Cement substrates obtained in example 2 and examples 6 to 11
Combining the data in table 3 of the grades of example 2 and examples 6-11, it can be seen that changing the particle size of the quartz sand has an effect on the flexural strength, compressive strength, luminance and duration of the self-luminous cement base material. In the test process, it is found that the smaller the diameter of the quartz sand is, the more difficult the system is to stir uniformly, in example 11, the mesh number of the quartz sand exceeds 120 meshes, the flexural strength and compressive strength of the prepared self-luminous cement base material are obviously reduced, and in addition, because the system is not uniform, the excitation effect of light on the long afterglow luminescent material is also influenced, and the brightness is reduced. In example 8, the mesh number of the quartz sand is less than 10 meshes, the flexural strength and compressive strength of the prepared self-luminous cement base material are not greatly changed, but the luminance is low, and it is inferred that the shape of the quartz sand is too large, so that the excitation effect of light on the long afterglow luminescent material is shielded, and the luminance is influenced, so that the particle size of the quartz sand is more preferably 10-120 meshes.
In addition, although the luminescence brightness of the self-luminous cement substrate obtained in example 9 was higher, the flexural strength and compressive strength were lower than those of the self-luminous cement substrate obtained in example 2, and the flexural strength and compressive strength of the self-luminous cement substrates obtained in examples 6 and 7 were close to those of example 2, but the luminescence brightness was lower than that of example 2, and therefore the mesh number of quartz sand in example 2 was more preferable.
Example 12
The difference from example 2 is that the quartz sand consists of the following continuous size fraction combinations: 10% to 16 meshes, 16% to 26 meshes, 14% to 40 meshes, 26% to 70 meshes and 34% to 70 meshes.
Example 13
The difference from example 2 is that the quartz sand consists of the following continuous size fraction combinations: 11% of 10-16 meshes, 17% of 16-26 meshes, 17% of 26-40 meshes, 24% of 40-70 meshes and 31% of 70-120 meshes.
Example 14
The difference from example 2 is that the quartz sand consists of the following continuous size fraction combinations: 13% of 10-16 meshes, 19% of 16-26 meshes, 17% of 26-40 meshes, 22% of 40-70 meshes and 29% of 70-120 meshes.
Example 15
The difference from example 2 is that the quartz sand consists of the following continuous size fraction combinations: 15% of 10-16 meshes, 21% of 16-26 meshes, 17% of 26-40 meshes, 20% of 40-70 meshes and 27% of 70-120 meshes.
Example 16
The difference from example 2 is that the quartz sand consists of the following continuous size fraction combinations: 12% of 10-16 meshes, 18% of 16-26 meshes, 15% of 26-40 meshes, 24% of 40-70 meshes and 31% of 70-120 meshes.
Example 17
The difference from example 2 is that the quartz sand consists of the following continuous size fraction combinations: 14% of 10-16 meshes, 18% of 16-26 meshes, 19% of 26-40 meshes, 21% of 40-70 meshes and 28% of 70-120 meshes.
Example 18
The difference from example 2 is that the quartz sand consists of the following continuous size fraction combinations: 16% of 10-16 meshes, 22% of 16-26 meshes, 20% of 26-40 meshes, 18% of 40-70 meshes and 24% of 70-120 meshes.
The self-luminous cement substrates prepared in examples 12 to 18 were subjected to the performance tests, the test methods and the standards were the same as above, and the specific test data are shown in Table 4.
Table 4: performance data for the self-luminous Cement substrates prepared in examples 12-18
As can be seen by combining the data of the embodiment 2, the embodiments 12 to 18 and the data of the Table 4, the flexural strength, the compressive strength and the light-emitting brightness of the self-luminous cement base material prepared by compounding the continuous-grade quartz sand are greatly improved, wherein the grade compounding of the quartz sand in the embodiment 14 is more preferable, the flexural strength of the prepared self-luminous cement base material is 16.5MPa, the compressive strength of the prepared self-luminous cement base material is 111.6MPa, and the light-emitting brightness of the prepared self-luminous cement base material is 170mcd/m2In the test process, the fact that the continuous-grade compounded quartz sand is adopted can enable the system of the self-luminous cement base material to be more compact and uniform, the more uniform system enables the long-afterglow luminescent material to be easier to carry out light excitation, and the improvement of the brightness is facilitated.
Example 19
The difference from the embodiment 14 is that Sr is adopted as the long persistence luminescent material4Al14O25:Eu2+,Dy3+。
Example 20
The difference from the embodiment 14 is that CaAl is adopted as the long persistence luminescent material2O4:Eu2+,Nd3+。
Example 21
The difference from the embodiment 14 is that Sr is adopted as the long persistence luminescent material2MgSi2O7:Eu2+,Dy3+。
The self-luminous cement substrates obtained in examples 19 to 21 were subjected to the performance tests, the test methods and the standards were as above, and the specific test data are shown in Table 5.
Table 5: performance data for the self-luminous Cement substrates obtained in examples 14, 19 and 21
It can be seen from the data of examples 14, 19 to 21 and Table 5 that the flexural strength, compressive strength, luminance and emission duration of the self-luminous cement base material using the aluminate-based long-afterglow phosphors and the silicate-based long afterglow phosphors meet the standards, wherein the Sr, silicate-based long afterglow phosphor, is used as the Sr material2MgSi2O7:Eu2+,Dy3+The self-luminous cement base material has better flexural strength and compressive strength, but the improvement range is not large, the self-luminous cement base material adopting the aluminate-based long afterglow luminescent material has better luminous brightness and luminous duration, and the luminous brightness difference of 10 hours after the light source stops excitation can reach 165mcd/m2Comprehensively considered, the self-luminous cement base material prepared by the aluminate-based long afterglow luminescent material has better comprehensive performance, wherein SrAl is used2O4:Eu2+,Dy3+Is more preferable as the long-afterglow luminescent material.
In conclusion, the self-luminous cement base material prepared by the proportioning method of the self-luminous cement base material has both mechanical property and afterglow property, excellent flexural strength and compressive strength, high luminous brightness, long luminous time, the afterglow time can reach 11h at most, and the luminous brightness after being excited for 10h without light source irradiation can still meet the minimum visible brightness (0.32 mcd/m) of human eyes2) The flexural strength of the cement base material in the 7-day age can reach 16.5MPa, the compressive strength can reach 111.6MPa, and the comprehensive performance is excellent.
The embodiments of the present application are merely illustrative and not restrictive, and those skilled in the art can modify the embodiments of the present application without any inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims of the present application.
Claims (10)
1. The self-luminous cement base material is characterized by comprising the following components in parts by weight through vacuum pressing treatment:
330-390 parts of quartz sand
140-180 parts of cement
3-6 parts of water reducing agent
18-30 parts of toughening agent
12-48 parts of long afterglow luminescent material
10-20 parts of water;
wherein the total water content of the water, the water reducing agent and the toughening agent is 18-24% of the weight of the cement, and the weight of the long-afterglow luminescent material is 8-28% of the weight of the cement.
2. The self-luminous cement substrate according to claim 1, characterized in that: the particle size of the quartz sand is 10-120 meshes.
3. The self-luminous cement substrate according to claim 2, characterized in that: the quartz sand is prepared by compounding the following continuous particle fractions in percentage by weight: 11% -15% of 10-16 meshes, 17% -21% of 16-26 meshes, 15% -19% of 26-40 meshes, 20% -24% of 40-70 meshes and 27% -31% of 70-120 meshes.
4. The self-luminous cement substrate according to claim 1, characterized in that: the long afterglow luminescent material is aluminate-based long afterglow luminescent material.
5. The self-luminous cement substrate according to claim 1, characterized in that: the water reducing agent is a polycarboxylic acid water reducing agent.
6. The self-luminous cement substrate according to claim 1, characterized in that: the toughening agent is styrene-butadiene emulsion, and the solid content is 45-50%.
7. The self-luminous cement substrate according to claim 1, characterized in that: the cement is P.W52.5 white cement.
8. The method for producing the self-luminous cement base material according to any one of claims 1 to 7, characterized by comprising the steps of:
uniformly mixing quartz sand and the long-afterglow luminescent material to obtain a mixture A;
uniformly mixing water and a water reducing agent, adding the mixture A, and uniformly mixing to obtain a mixture B;
adding the cement into the mixture B and uniformly mixing to obtain a mixture C;
adding a toughening agent into the mixture C and uniformly mixing to obtain a mixture D;
pouring the mixture D into a mold, and performing vacuum compression molding to obtain a rough blank;
and (5) performing steam curing on the rough blank to obtain the self-luminous cement base material.
9. The method for preparing the self-luminous cement base material according to claim 8, wherein in the vacuum pressing step, the vacuumizing time is 30-60 s, the absolute vacuum degree is 0.09-0.1 MPa, the pressure is 300 tons, the vibration frequency is 40-50 Hz, and the pressing time is 2-3 min.
10. The method for preparing the self-luminous cement base material according to claim 8, wherein in the steam curing step, the curing temperature is 60-70 ℃ and the curing time is not less than 7 days.
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| CN116814253A (en) * | 2023-06-19 | 2023-09-29 | 华北水利水电大学 | Hydrophobically modified long afterglow fluorescent powder and application thereof in self-luminous high-strength cement-based material |
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| US20150141552A1 (en) * | 2012-08-07 | 2015-05-21 | Tsutomu Takizawa | Method for producing concrete formed body |
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| US20150141552A1 (en) * | 2012-08-07 | 2015-05-21 | Tsutomu Takizawa | Method for producing concrete formed body |
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| CN116814253A (en) * | 2023-06-19 | 2023-09-29 | 华北水利水电大学 | Hydrophobically modified long afterglow fluorescent powder and application thereof in self-luminous high-strength cement-based material |
| CN116814253B (en) * | 2023-06-19 | 2024-05-10 | 华北水利水电大学 | Hydrophobically modified long afterglow fluorescent powder and application thereof in self-luminous high-strength cement-based material |
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